One percent phenyl - beta - naphthylamine was added to the recovered polymer as an antioxidant.将1%苯基 - β - 萘胺作为抗氧化剂加到所得到的聚合物中.Such compounds might be considered as a special type of antioxidant and classified as inhibito...
The photographic elements contain a blue - sensitive hydrophilic colloid silver halide emulsion layer.照像材料含有亲水胶体的感蓝卤化银卤剂层.The formation of polyhalide depends on the combination of central halide ions.多卤化物的形成取决于中心卤化物离子的结合...
Did equilibration take place before or after setting of chromite and silicates?究竟平衡作用发生在铬铁矿和硅酸盐下沉之前,还是在其后?Piaget thinks the development of cognition involves four aspects, such as schema, assimilation, readjustment and e...